2a06bf3e95
Add context tracking to the system call handler explicitly, and remove _TIF_NOHZ. This improves system call performance when nohz_full is enabled. On a POWER9, gettid scv system call cost on a nohz_full CPU improves from 1129 cycles to 1004 cycles and on a housekeeping CPU from 550 cycles to 430 cycles. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210130130852.2952424-31-npiggin@gmail.com |
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| .. | ||
| Makefile | ||
| ptrace32.c | ||
| ptrace-adv.c | ||
| ptrace-altivec.c | ||
| ptrace-decl.h | ||
| ptrace-fpu.c | ||
| ptrace-noadv.c | ||
| ptrace-novsx.c | ||
| ptrace-spe.c | ||
| ptrace-tm.c | ||
| ptrace-view.c | ||
| ptrace-vsx.c | ||
| ptrace.c | ||